Isoetes riparia

Isoetes riparia

Taxonavigation

Taxonavigation: Isoetales
Superregnum: Eukaryota Regnum: Plantae Divisio: Tracheophyta Divisio: Lycopodiophyta Classis: Lycopodiopsida Subclassis: Isoetidae Ordo: Isoetales

Familia: Isoetaceae
Genus: Isoetes
Species: Isoetes riparia

Name

Isoetes riparia Engelm. ex A.Braun, Flora 29: 178 (1846).

• Type: Delaware river near Philadelphia, gravelly shore, Dr. Zantziger, August 1844 (Holotype: MO)

Synonyms

• Homotypic
  • Calamaria riparia (Engelm. ex A.Braun) Kuntze, Rev. Gen. Pl. 2: 828 (1891).
• Heterotypic
  • Isoetes foveolata var. plenospora A.A.Eaton, Rhodora 5(59): 280 (1903).
    • Type locality: Massachusetts, ponds in the vicinity of North Easton, 1902, R.M. Grey.
  • Isoetes saccharata var. amesii A.A.Eaton, Rhodora 5(59): 278 (1903).
    • Type locality: Massachusetts, ponds in the vicinity of North Easton, 1902, R.M. Grey.
    • Isoetes amesii (A.A.Eaton) Gilbert, Fern Bull. 11: 103 (1903). nom. inval.
    • Isoetes canadensis var. amesii (A.A.Eaton) Clute, Fern Bull. 16: 54 (1908).
    • Isoetes riparia var. amesii (A.A.Eaton) Proctor, Amer. Fern J. 39: 119 (1949).
  • Isoetes saccharata var. palmeri A.A.Eaton, Proc. Biol. Soc. Wash. 14(10) 49 (1901).
    • Type: Maryland, Lloyd's Creek, Sassafras River, 12.8.1895, T.C. Palmer (Herb. Eaton, US, MO, MIN)
    • Isoetes saccharata f. palmeri (A.A.Eaton) Clute, Fern Bull. 11: 25 (1903).
    • Isoetes riparia var. palmeri (A.A.Eaton) Proctor, Amer. Fern J. 39: 119 (1949).
  • Isoetes saccharata var. reticulata A.A.Eaton, Proc. Biol. Soc. Wash. 14(10): 49 (1901).
    • Typus: Hunting Creek Bridge, 22 September 1900, Maxton s.n. (Holotypus: MO).
    • Isoetes saccharata f. reticulata (A.A.Eaton) Clute, Fern Bull. 11: 25 (1903).
    • Isoetes riparia var. reticulata (A.A.Eaton) Proctor, Amer. Fern J. 39: 119 (1949) (accepted by Brunton 2015).
• Misapplied names
  • Isoetes riparia var. canadensis auct. non Engelm., Trans. Acad. Sci. St. Louis 4: 383 (1882). nom. inval. = Isoetes × robusta
    • Isoetes canadensis auct. non A.A.Eaton, Proc. U.S. Nat. Mus. 23(1226): 650 (1901). = Isoetes × robusta
    • Isoetes riparia f. canadensis auct. non (Engelm. ex N.Pfeiff.) Proctor, Amer. Fern J. 39: 119 (1949). = Isoetes × robusta

Hybrids

I. × brittonii – I. × carltaylori – I. × jeffreyi – I. × novae-angliae

Distribution

Native distribution areas:
Continental: Northern America Regional: Northeastern U.S.A. Pennsylvania, West Virginia. Regional: Southeastern U.S.A. Delaware, Maryland, North Carolina, South Carolina, Virginia. References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

References

Additional references

• Brunton, D.F. & McNeill, J. 2015. Status, distribution, and nomenclature of Northern Quillwort, Isoetes septentrionalis (Isoetaceae) in Canada. Canadian Field-Naturalist 129(2): 174–180. DOI: 10.22621/cfn.v129i2.1698 Reference page. 
• Brunton, D.F. 2015. Key to the quillworts (Isoëtes: Isoëtaceae) of the southeastern United States. American Fern Journal 105(2): 86–100. DOI: 10.1640/amfj-105-02-86-100.1 . ResearchGate . Reference page. 
• Troìa, A., Pereira, J.B.S., Kim, C. & Taylor, W.C. 2016. The genus Isoetes (Isoetaceae): a provisional checklist of the accepted and unresolved taxa. Phytotaxa 277(2): 101–145. DOI: 10.11646/phytotaxa.277.2.1 ResearchGate Reference page. 

Links

• Govaerts, R. et al. 2024. Isoetes riparia in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2024 Sep 8. Reference page. 
• Tropicos.org 2024. Isoetes riparia. Missouri Botanical Garden. Published online. Accessed: 8 Sep 2024.
• International Plant Names Index. 2024. Isoetes riparia. Published online. Accessed: 8 Sep 2024.
• Hassler, M. 2024. World Ferns. Checklist of Ferns and Lycophytes of the World. . Isoetes riparia Accessed: 8 Sep 2024.

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